| Abstract |
| Abstract: When a metal is under continuous deformation, the flow stress usually depends upon strain, strain rate and temperature. However, under interrupted deformation at elevated temperatures such as multi-pass rolling or multi-step forging, it also depends upon the recrystallization behavior. In the present study, a coupled model consisting of recrystallization and flow stress models is proposed for prediction of the flow stress of steel in the austenite region. It is verified by comparing predicted values with experimental results and applied to a multi-stand finish rolling process of a hot strip to predict variations of grain size, flow stress and retained strain with respect to the process time. By incorporating with a finite element method, it is also applied to thick plate rolling processes to predict the variations including those in thickness direction. |
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| Key Words |
| Interrupted deformation, Steel, Recrystallization, Flow stress, Finite element method |
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